/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.twistinjava.ajax;

import com.twistinjava.exception.TwistinjavaException;
import com.twistinjava.util.DBManager;
import com.twistinjava.util.LoggableStatement;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.*;

/**
 *
 * @author shikhar
 */
public class CheckLogonID extends HttpServlet
{

    private static Log log = LogFactory.getLog(CheckLogonID.class);

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {

        log.debug("In CheckLogonID servlet");
        response.setContentType("text/html");
        response.setHeader("Cache-Control", "no-cache,no-store,must-revalidate");
        response.setHeader("Pragma", "no-cache");
        response.setDateHeader("Expires", 0);
        Connection conn = null;
        PreparedStatement preStmt = null;
        String result = null;
        int id=0;

        PrintWriter out = response.getWriter();
        try
        {

            conn = DBManager.getConnection();
            String loginID = request.getParameter("loginID");
            log.info("loginID :" +loginID);
                        String sql = new String();
            sql = ("SELECT * FROM User where logonID = ?");
            preStmt = new LoggableStatement(conn, sql);
            preStmt.setString(1, loginID);
            ResultSet rs = preStmt.executeQuery();
            if (rs.next())
            {
                id= rs.getInt("id");
                result = "The login ID is already registered." ;
            }
            else
            {
                result = "Available";
            }
            log.info("Result:" + result);
            response.getWriter().print(result);

        }
        catch (SQLException ex)
        {
            log.error("Exception inside CheckLogonID servlet **************"+ex.getMessage());

        }
        catch (TwistinjavaException ex)
        {
            log.error("Exception inside CheckLogonID servlet **************"+ex.getMessage());
            
        }
        finally
        {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo()
    {
        return "Short description";
    }// </editor-fold>
}
